What Oil to run

[MGILBERT18]

I will be changing my dino oil out very soon. I will run synthetic Amsoil, but should I run the 5-30 wt or 15-40? I would like to run this oil extended change intervals and from what I have read, the longerthe oil is run the higher the viscosity becomes. Any suggestions?? My sig is what I will be running the Amsoil in.

Mike

 

[FireMedicJO]

A lot of guys are running 5-30 Amsoil with no probs. This is what I plan to switch to within the next 9 months. IMHO, this decision should be based on the intervals you plan to use and what type of driving u will be doing. Will your truck tow heavy daily or at least often, do u race, basically will the engine be under significant loads routinely.

 

[MGILBERT18]

I will not be racing, except occasional dusting of a Chrysler Crossfire, no heavy towing, just normal day to day driving. I would like to extend oil change intervals out as long as the analysis comes back ok, 10,000-20,000 miles changing the filters at 5,000 mile intervals. I am also going to run the duel bypss filter system.

A lot of guys are running 5-30 Amsoil with no probs. This is what I plan to switch to within the next 9 months. IMHO, this decision should be based on the intervals you plan to use and what type of driving u will be doing. Will your truck tow heavy daily or at least often, do u race, basically will the engine be under significant loads routinely.

 

[FireMedicJO]

Almost carbon copy of my driving habits, with the exception of hopefully adding a 5'er in the next couple of years. I'd say you'd be safe with the 5-30. Hope this helps

 

[Wrecker]

AME, 15w-40 is what I recommend. Let me know if I can help.

 

[MGILBERT18]

Why not the 5-30?? Why do you recommend the 15-40? Is their a technical reason? Just interested.

Mike

AME, 15w-40 is what I recommend. Let me know if I can help.

 

[Wrecker]

As you can see below, the properties are similar, but the 4 balls test and volatility numbers are a little better for the 15w-40. It protects from wear a little better and cooks off a little less.

Unless you live way up north, and I mean way up, the difference in cold cranking isn't much of an issue. Tundra based customers should by all means use the 5w-30.


Both have the same extended drain capability, and the AME 15w-40 is cheaper. Both are outstanding oils, it's really a personal preference.
​

TYPICAL TECHNICAL PROPERTIES​

AMSOIL Synthetic SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil (AME)​

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)​

14.2​

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)​

93.2​

Viscosity Index (ASTM D-2270)​

157​

CCS Viscosity @ -20°C, cP (ASTM D-5293)​

4386​

Pour Point °C (°F) (ASTM D-97)​

-42 (-44)​

Flash Point °C (°F) (ASTM D-92)​

238 (460)​

Fire Point °C (°F) (ASTM D-92)​

256 (493)​

Four Ball Wear Test (ASTM D-4172B: 40 kg, 75°C, 1200 rpm, 1 hour), Scar, mm​

0.35​

Noack Volatility, % weight loss (g/100g) (ASTM D-5800)​

7.0​

High Temperature/High Shear Viscosity
(ASTM D-4683 @ 150°C, 1.0 X 106 s.-1, cP​

4.3​

Total Base Number 12.1

TYPICAL TECHNICAL PROPERTIES - Revised as of 6/08​

AMSOIL Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)​

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)​

11.4​

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)​

65.4​

Viscosity Index (ASTM D-2270)​

170​

Cold Crank Simulator Apparent Viscosity @ -30°C, cP (ASTM D-5293)​

5271​

Pour Point °C (°F) (ASTM D-97)​

-50 (-58)​

Flash Point °C (°F) (ASTM D-92)​

240 (464)​

Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss​

7.6​

High Temperature/High Shear Viscosity, cP, 150°C, 1.0 x 106 s-1 (ASTM D-4683)​

3.4​

Four-Ball Wear Test (ASTM D-4172: 40kgf, 150°C, 1800 rpm, 1 hr) Scar diameter, mm​

0.38​

Total Base Number​

12.1​

​

 

[MGILBERT18]

//thanks for the info

As you can see below, the properties are similar, but the 4 balls test and volatility numbers are a little better for the 15w-40. It protects from wear a little better and cooks off a little less.​

Unless you live way up north, and I mean way up, the difference in cold cranking isn't much of an issue. Tundra based customers should by all means use the 5w-30.​

Both have the same extended drain capability, and the AME 15w-40 is cheaper. Both are outstanding oils, it's really a personal preference.​

TYPICAL TECHNICAL PROPERTIES

AMSOIL Synthetic SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil (AME)​

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)​

14.2​

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)​

93.2​

Viscosity Index (ASTM D-2270)​

157​

CCS Viscosity @ -20°C, cP (ASTM D-5293)​

4386​

Pour Point °C (°F) (ASTM D-97)​

-42 (-44)​

Flash Point °C (°F) (ASTM D-92)​

238 (460)​

Fire Point °C (°F) (ASTM D-92)​

256 (493)​

Four Ball Wear Test (ASTM D-4172B: 40 kg, 75°C, 1200 rpm, 1 hour), Scar, mm​

0.35​

Noack Volatility, % weight loss (g/100g) (ASTM D-5800)​

7.0​

High Temperature/High Shear Viscosity

(ASTM D-4683 @ 150°C, 1.0 X 106 s.-1, cP​

4.3​

Total Base Number 12.1​

TYPICAL TECHNICAL PROPERTIES - Revised as of 6/08​

AMSOIL Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)​

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)​

11.4​

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)​

65.4​

Viscosity Index (ASTM D-2270)​

170​

Cold Crank Simulator Apparent Viscosity @ -30°C, cP (ASTM D-5293)​

5271​

Pour Point °C (°F) (ASTM D-97)​

-50 (-58)​

Flash Point °C (°F) (ASTM D-92)​

240 (464)​

Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss​

7.6​

High Temperature/High Shear Viscosity, cP, 150°C, 1.0 x 106 s-1 (ASTM D-4683)​

3.4​

Four-Ball Wear Test (ASTM D-4172: 40kgf, 150°C, 1800 rpm, 1 hr) Scar diameter, mm​

0.38​

Total Base Number​

12.1​

 

[Dirtbikindad393]

A lot of guys are running 5-30 Amsoil with no probs. This is what I plan to switch to within the next 9 months. IMHO, this decision should be based on the intervals you plan to use and what type of driving u will be doing. Will your truck tow heavy daily or at least often, do u race, basically will the engine be under significant loads routinely.

It should also be based on the climate in which you live and the warranty on your truck. The manuel recommends 15w-40 your waranty is good on 15w-40. The 5w-30 will give you slightly better mpg and be a better choice in Barrow, Alaska. In Dallas (very Hot in the spring/summer) and in TN warm in the summer not to many days below 10* I would be using the 15w-40 as The Oil Geek says.